A deep-sea shellfish harvesting system and its harvesting method for continuous operation by two ships

Abstract

The invention belongs to the field of aquaculture equipment engineering, and particularly relates to a double-ship continuous operation type deep sea shellfish fishing and catching system and a fishing and catching thereof. The method comprises the steps that an ecotype bottom trawl fishes and catches marine demersal shellfish into a net on the condition that the bottom environment is not influenced under the traction of a dragging ship, the collected shellfish collect in a fish bag of the ecotype bottom trawl under the action of water current and netting gears, when an online video monitoring device observes that the fish catch of the shellfish in the fish bag reaches a fishing and catching requirement, the shellfish are indrawn on a fishing and catching ship by a conveying pipeline fixed on the fish bag under the action of a self-priming pump, and a continuous fishing and catching process is completed. According to the double-ship continuous operation type deep sea shellfish fishing and catching system and the fishing and catching thereof, the shellfish catches in the ecotype bottom trawl can be conveyed to the fishing and catching ship in time, there is no need to repeat net hauling and net shooting, accordingly the operation time is saved, the leakage capture rate is reduced, the bottom environment and resources are protected, and the fishing and catching system and the fishing and catching thereof are especially suitable for the continuous fishing and catching operation of marine pasture area large-area bottom sowing shellfish.

Description

technical field [0001] The invention belongs to the field of aquaculture equipment engineering, and specifically relates to a two-vessel continuous operation type deep-sea shellfish harvesting system and a harvesting method thereof. Background technique [0002] At present, the shellfish cultured by bottom sowing in deep sea areas in my country are mainly scallops, in addition to a small amount of clams and clams. Deep-sea shellfish harvesting is usually carried out by bottom trawling. The bottom trawling gear is pulled by the trawler to carry out "sweeping" operations in the sea area; when the net is fully loaded, the boat stops and the net is unloaded to unload the catch, and then the net is released again. This method of operation has the following three disadvantages: [0003] 1. Since the position of lifting and releasing the net cannot be guaranteed to be at the same place, there is a missing catch area in the operation, which reduces the output; or in order to reduce...

AI Technical Summary

Problems solved by technology

[0003] 1. Since the position of lifting and releasing the net cannot be guaranteed to be at the same place, there is a missed catch area in the operation, which reduces the output; or in order to reduce the missed harvest, the operation method of repeatedly sweeping the sea is adopted, which increases the cost of harvesting

[0004] 2. A large amount of manpower is required to lift and release the net gear, which not only has high labor costs, but also has long working hours and low efficiency

[0005] 3. The trawler also serves as a cargo vessel. As the operation continues, the load increases, the trawling capacity decreases, and the operating efficiency decreases

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